package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService{
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;
    /**
      * 用户下单
      * @param orders
      */
     @Transactional
    public void submit(Orders orders) {

         //获得当前用户id
         Long userId = BaseContext.getCurrentId();

         //查询当前用户的购物车数据
         LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
         wrapper.eq(ShoppingCart::getUserId,userId);
         List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

         if(shoppingCarts == null || shoppingCarts.size() == 0){
             throw new CustomException("购物车为空，不能下单");
         }

         //查询用户数据
         User user = userService.getById(userId);

         //查询地址数据
         Long addressBookId = orders.getAddressBookId();
         AddressBook addressBook = addressBookService.getById(addressBookId);
         if(addressBook == null){
             throw new CustomException("用户地址信息有误，不能下单");
         }

         long orderId = IdWorker.getId();//订单号

         AtomicInteger amount = new AtomicInteger(0);

         List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
             OrderDetail orderDetail = new OrderDetail();
             orderDetail.setOrderId(orderId);
             orderDetail.setNumber(item.getNumber());
             orderDetail.setDishFlavor(item.getDishFlavor());
             orderDetail.setDishId(item.getDishId());
             orderDetail.setSetmealId(item.getSetmealId());
             orderDetail.setName(item.getName());
             orderDetail.setImage(item.getImage());
             orderDetail.setAmount(item.getAmount());
             amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
             return orderDetail;
         }).collect(Collectors.toList());


         orders.setId(orderId);
         orders.setOrderTime(LocalDateTime.now());
         orders.setCheckoutTime(LocalDateTime.now());
         orders.setStatus(2);
         orders.setAmount(new BigDecimal(amount.get()));//总金额
         orders.setUserId(userId);
         orders.setNumber(String.valueOf(orderId));
         orders.setUserName(user.getName());
         orders.setConsignee(addressBook.getConsignee());
         orders.setPhone(addressBook.getPhone());
         orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                 + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                 + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                 + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
         //向订单表插入数据，一条数据
         this.save(orders);

         //向订单明细表插入数据，多条数据
         orderDetailService.saveBatch(orderDetails);

         //清空购物车数据
         shoppingCartService.remove(wrapper);
     }
}
